望着那片触不可及的蓝。

Looking at that piece of reach blue.

飞行背包——又叫喷气背包，最初出现在《惊悚故事》漫画书和巴斯特·克拉比的系列电影中，是最令人垂涎三尺又触不可及的科幻机器。

Originally imagined in Amazing Stories comic books and Buster Crabbe film serials, the flying backpack - or jetpack - is the most desirable and elusive of sci-fi gadgets.